buildings become damage over time ?

[VoodooDog]

i have to plant building on stone so they dont become damage ?

or just small buildings like loom got damaged over time ?
i have to place things like loom on stone ?

[loftar]

Generally, things that would reasonable be kept inside to avoid weather deterioration do, indeed, take quite heavy amounts of damage outside. Keep them inside a log cabin, and they won't decay.

The loom is one of those things. I don't remembed off-hand the exact list of other things with the same property, but it's somewhere within the relevant Announcement thread.